I would really like to have an option or template to send a plain text email only without the HTML

I would really like to have an option or template to send a plain text email only without the HTML

This way recipients will see a regular email and not marketing materials. The only feature I would like to have would be auto insertion of the recipient first name into the email. I believe having this option would help increase the number of recipients who actually read the email instead of junking it the second they something that looks like marketing materials.